Family is heading for this shopkeeper? (8)
I believe the answer is:
stockist
'shopkeeper?' is the definition.
'family is heading for this' is the wordplay.
'family' becomes 'stock' (**).
'heading for' says to take the initial letters.
The first letter of 'this' is 't'.
'stock'+'is'+'t'='STOCKIST'
(Other definitions for stockist that I've seen before include "Retailer of a particular line of goods" , "Shop that carries a particular item" , "dealer" , "Retailer carrying a particular item" .)